NO. 2192. DRAG0NFLTE8, CALIFORNIA AND NEVADA— KENNEDY. 595 



24. AESHNA WALKERI Kennedy. 



Co mm on on San Francisqiiito and other creeks from August to 

 November. 



25. LIBELLULA FORENSIS Hagen. 



Common on ponds and stagnant streams. 



26. LIBELLULA PULCHELLA Drury. 



Occasional on ponds. 



27. LIBELLULA SATURATA Uhler. 



Common on all ponds. 



28. PLATHEMIS LYDIA (Drury). 



Common on all ponds. 



29. ERYTHEMIS SIMPLICICOLLIS (Say). 



Common on all ponds. 



30. SYMPETRUM CORRUPTUM (Hagen). 



Common on ponds. This is on the wing from the latter part of 

 February tiU December. 



31. SYMPETRUM ILLOTUM (Hagen). 



The most common Sympetrum. This has also a long season, 

 March till November. 



32. SYMPETRUM MADIDUM (Hagen). 



Common on the mountain ponds, emerging in June. 



33. PACHYDIPLAX LONGIPENNIS (Burmeister). 



On Felt Pond. 



34. TRAMEA LACERATA Hagen. 



On Sharen Pond. 



STEVENS CREEK, SANTA CLARA COUNTY, CALIFORNIA. 



The upper 10 miles of this creek is a clear, swift momitain stream. 

 During the rainy season it empties into San Francisco Bay, but 

 from Jmie to December there is no water in its lower more level 

 course. It comes down through a narrow gorge, and is heavily 

 shaded by alders and bay trees. 



1. ARGIA VIVIDA Hagen. 



Occasional about springs along the lower course of the creek. 



2. CORDULEGASTER DORSALIS Hagen. 



Common on the swift upper end of the creek (see p. 515). 



3. OPHIOGOMPHUS BISON Selys. 



One specimen was seen near the Trout Farm. 



4. OCTOGOMPHUS SPECULARIS (Hagen). 



Common on the swift upper end of the creek. 



5. AESHNA PALMATA Hagen. 



One female was taken in August near Soda Spring. This is the 

 farthest southwest record for the species. 



6. AESHNA WALKERI Kennedy. 



Common along the creek (see p. 586). 



7. SYMPETRUM ILLOTUM (Hagen). 



Two seen below the Trout Farm. 



